The bird flu outbreak has spread into northeast Nebraska. Now, officials are planning to kill 1.7 million chickens on an egg farm in Dixon County. The USDA’s Animal and Plant Health Inspection Service said Tuesday that the presence of the illness on the farm as first one in Nebraska.

Bird flu is already widespread in Iowa, where more than 26 million chickens have been lost. Officials routinely destroy the entire flock when the disease is found to limit its spread. The Agriculture Department says the bird flu doesn’t represent a significant health risk to humans, and no human infections have been found.